Which of these is not true of a lossless line? (a) ZinjZ, for a shorted line with l = 1/8. (b) Zin = joo for a shorted line with l = λ/4. = (c) ZinjZ, for an open line with l = λ/2. (d) ZinZ for a matched line.
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Just started Transmission Lines not sure how to approach this example. Thanks
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- A lossless T.L of 10.25m long with Z-50 2. The line is terminated in Zr=75+j7592. If the operating frequency is 150MHz and=10 volts, use Smith chart or equations to find: VS 1. The Vmax and V min. 2. The standing wave ratio (S). 3. The sending end impedance (Zs). 4. The sending end voltage and current. 5. The distance to the first maximum Zmax from the load.A coaxial cable is 10 meters long, and is filled with lossless Teflon, having a relative permittivity of 2.1. There is a matched load at the end of the line (this means that there is no reflection at the end, so there is only a signal traveling in the + z direction). At the input of the line, a sawtooth waveform is applied, having a peak voltage of 1.0 [V] and a duration of 1.0 [ns] (the time from the beginning of the waveform until the end). Make a plot (versus time) of what an oscilloscope would read if it were connected to the line at various locations, corresponding to the following values of z: 0.0 [m], 1.0 [m], 5 [m], 10 [m]. Plot out to 50 [ns] 1An extra high voltage transmission line of length 300 km can be a lossless line having propagation constant B=0.00127 radians per km. Then what is the percentage ratio of line length to waveform. A.24.24 % B.12.12% C.19.05 % D.6.06 %
- Example 2: For the lossless TL shown in below with length 1, let Zg Zo/3 and ZR = 0 (short circuit load). Use Zig-zag diagram to show the incident and reflected signals for 8T, then draw the time- spacing diagram for the sending end Es and Is and receiving end ER and IR. OF = E 20 0₂₁Electrical Engineering A losless line assumed to be infinitely long and of unknown characteristic impedance Z,, when connected to a lossless line of characteristic impedance 10092, produces a standing wave ratio of value 2 in the 1002 line. The same line (of unknown impedance) when connected to a line with the characteristic impedance 202 produces a standing wave ratio of value 2.5 in the 2012 line. Find: 1) possible values of the reflection coefficient from the connection between the 10092 and Z, lines; 2) possible values of the reflection coefficient from the connection between the 20 and Z.A lossless transmission line is terminated by an open circuit. An incident signal travels from the source to the load gets reflected and travels all the way back to the source. It takes 6 microseconds for the signal to go from the source to the load and then from the load to the source. What is the length of the line (in m) if the propagation velocity is equal to the speed of light (in m/s)? Enter only the numerical value. No need for the unit. Use four decimal places (if the answer is not an integer).
- The observed standing-wave ratio on a 100-Ω lossless line is 8. If the first maximum voltageoccurs at 0.3λ from the load, calculate the load impedance and the voltage reflection coefficientat the load. (use smith chart) How do you use a smith chart to solve this?Example 5 For the lossless TL shown in below with length 1 and characterístic impedance Zo, let Zg = Zo and ZR = Zo. The line in connected another lossless TL with with length and characteristic impedance 2Z and an impedance of Zo is connected between the two line as well. Use Zig-zag diagram to show the incident and reflected signals for 8T, then draw the time-spacing diagram for the sending end Es and receiving end ER and at the point the two lines are connected Emid. E +1 Hint: K→ (3Zo||2Zo)-Zo mid (3Zo||2Zo)+Zo = ន ZO Kt. mid 3Z0 (3Z0||Zo)-2Zo (3Zo||Zo)+2Zo 2Z0 ZLExample 2: For the lossless TL shown in below with length 1, let Zg Zo/3 and ZR = 0 (short circuit load). Use Zig-zag diagram to show the incident and reflected signals for 8T, then draw the time- spacing diagram for the sending end Es and Is and receiving end ER and IR. OF = E ZO 0₂₁
- For the lossless TL shown in below with length 1, let Zg - 620, ZR = (open circuit load) and the supplied voltage is 100V. Use Zig-zag diagram to show the incident and reflected signals for 8T, then draw the time-spacing diagram for the sending end ES and IS and receiving end ER and IRAn extra high voltage transmission line of length 300 km can be approximated by a lossless line having propgation constant is 0.00127 rad/km. The percentage ratio of line length to wave length will nearly by ?Example 3: For the lossless TL shown in below with length 1, let Zg = 6Zo and ZR 0 (open circuit load). Use Zig-zag diagram to show the incident and reflected signals for 8T, then draw the time- spacing diagram for the sending end Es and Is and receiving end ER and IR. zo